The Island of Adventure (Adventure #1)

Four children on holiday find adventure on the mysterious Isle of Gloom.

Long Synopsis:

Enid Blyton's classic adventure series is fantastically repackaged for a new generation of readers. For Philip, Dinah, Lucy-Ann and Jack, the holiday in Cornwall is everything they'd hoped for--until they begin to realize that something very sinister is taking place on the mysterious Isle of Gloom. But they're not prepared for the dangerous adventure that awaits them in the abandoned copper mines and secret tunnels beneath the sea.